Self-lubricating piston



T. ROGATCHOFF. SELF LUBRICATING PISTON.

APPLICATION FILED DEC-9,1918.

1,330,748. Patented Feb. 10, 1920.

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SELF LUBRICATING PISTON. APPLICATION man mac. 9, 1918.

1,330,748. Patented Feb. 10,1920.

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SELF LUBRVICATING PISTON.

APPLICATION FILED [150.9, ma.

1,330,748. Patented Feb. 10,1920.

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SELF LUBRICATING PFSTON.

APPLICATION FILED DEC.9, I918.

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SELF LUBRIQATING PISTON.

APPLICATION FILED DEC. 9, I918.

Patented Feb. 10, 1920.

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awuewtoz fieadara /70 wi bnmwonrrnn STATES PATENT ossion.

THEODORE ROGATOI-IOFF, OF BALTIMORE, MARYLAND.

SELF-LUBRICATING PISTON.

Application filed December 9, 1918.

To all whom it may concern:

Be it known that I, THEODORE ROGAT- CHOFF, a citizen of the Republic ofRussia, residing at Baltimore city, in the State of Maryland, haveinvented certain new and useful Improvements in Self LubricatingPistons, of which the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to new and useful improvements in pistons forlocomotives and other engines, and the object in view is to produce asuitable lubricating means for the pistons. I I

The invention comprises a simple and efficient device of this characterhaving various details of construction, combination and arrangement ofparts which will be hereinafter fully described, shown in theaccompanying drawings and then specifically defined in the appendedclaims.

My invention is illustrated in the accompanying drawings which, with thenumerals of reference marked thereon, form: a part of this applicationand in which:

Figure 1 is a perspective view of a piston made in accordance with myinvention.

Fig. 2 is a vertical sectional view through the piston.

Fig. 3 is a bottom plan view.

Fig.4 is a sectional view on line 4-4 of Fig. 2'.

Fig. 5 is a detail perspective view of a bull ring.

Fig. 6 is a detail perspective of a plug with lubricating valve block.

Fig. 7 is a sectional view showing a modified form of the piston.

Fig. 8 is a sectional view on line 8-8 of Fig. 7.

Fig. 9 is a detail view of a slightly modified form.

Fig. 10' is an edge view of Fig. 9.

Fig. 11 is a central sectional view of a still differently modified formof the invention.

Fig. 12 is an edge view of Fig. 11.

Fig. 13 is a sectional View on line 1 313 of Fig. 11.

Fig. 14 is a perspective view of the form shown in Fig. 11, parts beingbroken away.

Fig. 15 is a detail perspective view of a part of the piston.

Fig-16 is a bottom plan view of the plate shown in Fig. 152 gSpecification of Letters Patent.

Patented Feb. 10, 1920.

Serial No. 265,953.

Fig. 17 is a sectional view of a modified form of the piston.

gig. 18 is a bottom plan view of Fig. 17, an

Fig. 19 is a sectional view of a feature of the invention.

Reference now being had to the details of the drawings by numerals:

21 designates a piston which is apertured for the reception of the stem21', and 22 is a bull ring having a circumferential groove 30 thereinand which ring is mounted about the piston and securely fastenedthereon.

Referring to Fig. 2 of the drawings showing a central sectional viewthrough the piston and bull. ring, it will be noted that the bull ring,a detail of which is shown in Fig. 5, is provided with two concentricflanges 23 and 24, the ends of which overlap each other, and 27designates bridge portions between the walls of the grooved portion ofthe bull ring. Said flange 24 is provided with parallel grooves 28,shown clearly in Fig. 3 ofthe drawings, and threaded openings 25 areformed in the flange 24 and each is adapted to receive acircumferentially threaded plug 26, detail of which is shown in Fig. 6of the drawings, and which plug has apertures 26' leading therethrough,and pins 34 having threaded portions tapped into the plugs project fromthe inner face of a recess in the plug. An oil valve block 32 ismountedin the recess of each plug intermediate the pins, said valve beingprovided with grooves 33 in its outer face, and through which alubricant is adapted to flow.

Upon reference to Fig. 2 of the drawings, it will be noted that a valvecasing 31 is threaded into the wall 31 of the cylinder and through whicha lubricant is fed into the groove of the bull ring, the lubricant beingshown by dotted lines.

In Fig. 7 of the drawings I have shown a modified form of the inventionin which the bull ring 48, which is shrunken upon the circumference of apiston and held by plugs 48*, clearly shown in Fig. 8 of thedrawings,and 49 is a lubricating plate held to the bull ring by means of screws50, said plate being provided with apertures for the reception of theplugs 26 having oil ducts 26 therein, and an oil valve block 32 ismounted in the recessed portion of the plug.

In Fig. 9 of the drawings is shown a slightly modified form of thepiston, in I which the central portion 43 thereof, which is solid, isprovided with a flange 45 circumferentially grooved as at 46, andprovided with an integral flange 44 having a single plug 26 mountedtherein.

In Figs. 11 to 16 of the drawings (inclusive) I have shown a stilldifferently modified form of the piston, in which the piston 4 isprovided with a circumferential groove 6 forming an oil chamber, saidpiston being mounted within a cylinder 1 having an opening 2 therein inwhich the valve 3 is threaded and through which lubricant is introducedinto the groove 6.

In the form shown in Fig. 11, a lubricating plate 8 is held by means ofrivets to the plate 16 and has ducts 10 formed therein through whichlubricant passes into the elongated grooves 9, shown clearly in Figs. 15and 16 of the drawings. In this modified form of the invention valveblocks 18, one of which is shown clearly in perspective in Fig. 15, areprovided with channels 14 upon their outer faces, and which blocks areadapted to be positioned upon the inner concaved face of the lubricatingplate 8. Screws 11 pass through the lubricating plate and serve to guidethe valve blocks as they are caused to be given a back and forthmovement incident to the reciprocating movement of the piston. Theopposite ends of the plate 8 are shouldered as at 17, and 16 designatecurved plates which are fastened at their lower ends to said shoulders.The upper portions of the plates 16 are fastened to the cross pieces 19spanning the groove in the circumference of the piston.

In Figs. 17 and 18 is a still differently modified form of the inventionand in which is shown a lubricating plate 37, apertured as at 39, whichis fastened to the piston by means of screws 38 in the circumferenceofthe piston. In this form of piston, which has channels 41 in the plate87, screws 42 are mounted the ends of which project inside the grooveand serve to guide the oil valve blocks 40.

In the form shown in Fig. 19 of the drawings, I have shown a means forpreventing the passage of the oil through the ducts in the plug when thepiston is not moving, and in which figure the reciprocating movement ofthe piston is necessary in order to throw the block 32 in oppositedirections against the tensions of the springs 32. In this constructionthe block is provided with recesses 32 connected by an aperture throughwhich the pin 32* passes, the ends of which pin are loosely held in theslots 26 permitting a vertical adjustment of the block 32 incident towear. The form of block mounting shown in Fig. 19 also serves as a shockabsorberto the oil. valve or block and will prevent its coming forciblyagainst the opposite walls of the plug when the piston reciprocates.

In operation, oil is admitted through the valve 3 into the groove of thepiston or bull ring, as the case may be, and as the piston isreciprocated the oil valve or block will be thrown back and forthagainst the ends of the recess in the plug, or when the device isconstructed in accordance with the showing in Figs. 14 and 17 of thedrawings, against the walls of the groove when the plug is dispensedwith and an oil block is provided which rests upon the inner concavedsurface of the lubricating plate or flange. Said oil valve tends tolimit the amount of the lubricant permitted to pass through the ductsinto the interior of the piston chamber.

By the provision of a lubricating device embodying the features of myinvention, it will be noted that the annular space commonly formed inthe circumference of a piston is utilized as a reservoir for oil, orwhere the pistons are dressed down and bull rings shrunken thereon areprovided with grooves which are utilized for the same purpose.

WVhen it is desired to dispense with the plug or the oil valve, the oilreservoir still may be utilized for lubricating the pistons by splashingmeans through the opening of groove at the top of piston. In the eventof it being desired to dispense with the oil reservoir, the bottom platewhich covers the groove in the piston may be utilized as a bearing forthe bottom of the piston.

What I claim to be new is:

1. A self-lubricating piston of the horizontal type having acircumferential groove, and means for closing the lower portion of thegroove, thereby forming a lubricant reservoir, said means having ductsfor the passage of a lubricant to the exterior thereof to lubricate thepiston.

2. A self-lubricating piston of the horizontal type having acircumferential groove, and means for closing the lower portion of thegroove and thereby forming a lubricant reservoir, movable means withinthe groove adapted to regulate the passage of lubricant to the exteriorof the piston.

3. A self-lubricating piston of the horizontal type having acircumferential groove, and means for closing the lower portion of thegroove and thereby forming a lubricant reservoir, a movable member forregulating the flow of the lubricant to the exterior of the piston, andmeans for limiting the movement of said member. 7

4. A self-lubricating piston of the horizontal type having acircumferential groove, and means for closing the lower portion of thegroove thereby forming a lubricant reservoir, a movable member forregulating the flow of the lubricant to the exterior of the piston, pinsprojecting from the lower closed portion of the groove and in the pathof said member to limit its movement in opposite directions.

5. A self-lubricating piston of the horizontal type having acircumferential groove with an apertured plate for closing the lowerportion of the groove and forming a lubricant reservoir, said platehaving an opening formed therein, a removable apertured plug fitted insaid opening, and means within the plug for regulating the flow oflubricant through theapertures of the plug to lubricate the exterior ofthe piston.

6. A self-lubricating piston of the horizontal type having acircumferential groove with an apertured plate for closing the lowerportion of the groove and forming a lubricant reservoir, said platehaving an opening formed therein, a removable aperturecl plug fitted insaid opening, said plug having projections thereon, a movable membermounted upon the plug between said projections and regulating the flowof lubricant through the aperture of the plug.

In testimony whereof I hereunto affix my 25 signature in presence of awitness.

THEODORE ROGATCHOFF.

Witness A. L. HOUGH.

